$ git clone -n https://gitee.com/src-opencloudos-rpms/jbig2dec.git /var/lib/mock/dist-oc9-build-41790-14591/root/chroot_tmpdir/scmroot/jbig2dec
Cloning into '/var/lib/mock/dist-oc9-build-41790-14591/root/chroot_tmpdir/scmroot/jbig2dec'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/jbig2dec
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9e657b import jbig2dec-0.19-3.tl4